Plaster-board with reinforce-ribs.



' Patented July 18, 1916.

G. P. CRUMBAUGH.

PLASTER BOARD WITH REINFORCE RIBS.

APPLICATION FILED MAR-31,1914.

UNITED sTATEs PATENT oEEIcE.

GEORGE P. CRUMBAUGH, OF ST. LOUIS, MISSOURI, ASSIGNOR 0F ONE-HALF T0 EDWIN W. GROVE, OF ST. LOUIS, MISSOURI.

PLASTER-BOARD WITH REIN FiORCE-RIBS.

Specification of Letters Patent.

Application filed March 31, 1914. Serial No. A828,589.

To f// whom. vl' vmuy concern.'

lie it known that l, (l1-:onen l. CRUM- |:.\i'u|l, a citizen of the United States, residing at St. Louis. in the State of l\lissouri, have inventednew and useful lmprovelmints in Plaster-'Boards with lieinforce-ltibs, of which the following is a specification.

'l'his invention relates to plaster boards or wall coverings of that type embodying a. baclving sheet to which a corrugated sheet is secured, and the primary object of the invention is to provide a plaster hoardor wall covering of this type with reinforcing means in engagement with and readily removable l'rom the corrugations. the purpose of the reinforcing means being to stiften .the plaster board or wall.l` covering at points where it is desired to increase. the resistance thereof relatively to weight strain imposed thereon b v the plaster covering and also to provide for strengthening the edge pol'- tions thereof that may he at the bottom or at other points of a wall demanding a more rigid structure as a covering than would be provided by the hoard without the said reinforcing means. The improved plaster board or wall covering is adapted to be applied to the usualstudding in place of the ordinaryy lath and plaster or to a continuous partition surface. or to a ceiling, and by the construction and arral'igement of the several. parts thereof the. board is n'iaterially strengthened to resist and equalize weight strain that may he imposed thereon hy the plaster covering which is spread thereover.

lhe invention consists in the construction and arrangement of the several parts which will he more fully hereinafter described and claimed.

ln the drawing: Figure 1 is a perspective view of a portion of a plaster b/oard or wall covering embodying the features of the invention. Fig. 2 is a transverse vertical section through the plaster board or covering as shown by Fig. 1. Fig. 3 illustrates in transverse vertical section a modified form of the board or covering and as particularly embodying a corrugated sheet or strip between the rear and front flat strips.

The numeral 5 designates a backing sheet which is flat and in the present instance preferably imperforate, and secured thereto by any suitable cement, such as asphalt or pitch, is a corrugated sheet or strip 6. The sheets or strips 5 and 6 may be of any suitable material, but are preferably formed of paper, and it will be. understood that the. wall board or covering may bemade in lengths and widths of various dimensions and is adapted to be rolled for convenience in shipping and storage. It will be understood that the improved wall board or covering may have the sheets comprised in the. organization of the same of any thickness, and the corrugations of the. sheets may be varied as,to their dimensions to adapt the same to ditl'erent applications.

ln the form of thel improved device as shown by Figs. 1 and 2, reinforcing` ribs or strips 7 are inserted longitudinally into the corrugations of the sheet the said reinforcing strips being readily removable and shiftable as may be desired to engage different corrugations. lhe purpose of shifting theI ribs or strips 'T is to strengthen the portions of the wall board or covering where the greatest reinforce ma \v be desired,.and this may be at the edges where the wall board or covering is secured at the bottom or top or at intermediate. points as may be found necessary, and the object of the reinforcing ribs is to give. the wall board or covering greater rigidity or resistance, to the weight strain of the plaster covering that may be applied thereover. lt is obvious that in applying the wall board or covering to studding or to wide gaps on suitable. supports or even to flat surfaces the. ribs or strips 7 'will be materially ad vantageous and not only prevent cracking or sagging of the plaster covering thereon, but will at the same time materially stiften the board or covering and render the same more durable.

In Fig. 3 a backing sheet 5 and a corrugated sheet G are used as shown in' Figs. 1 and 2, but in addition an outerflat facing sheet 8 is applied over the corrugations and the reinforcing ribs or strips 7 are removably inserted in the eorrugations between the backing and facing strips 5 and 8 at any point that may be desired, or if found necessary the ribs or strips 7 may be inserted between the corrugations and in some instances this particular arrangement of the ribs or strips will be found advantageous. The improved wall board or covering as shown by Fig. 3 will be exceptionally convenient in forming partitions or in presenting lat surfaces, especially on side Walls, and it is possible to so ornament or arrange the facing strip 8 that the same may serve as the finishing covering or surface of the Wall.

It is proposed to waterproof and fireproof the Wall board or covering as above explained in any manner desired, and the present construction is distinguished from that disclosed in my copendingapplication, Serial Number 828,590 in that the corrugated sheet and backing sheet are Without perforations.

In applying the improved wall board or covering as herein disclosed to a wall or ceiling the same is laid flat against the studding or joists and secured,the edges of the sheets being brought in close engagement to form a neat joint, and aftery the wall is covered the plaster coating, which will be of any suitable nature, is applied over the corrugated face of the covering or the corrugated surface exposed, which produces a key means to hold the plaster covering in place and distribute the weight of the said plaster covering equally over the surface of the corrugated'sheet or assembled sheets. It will also be understood that any suitable securing means may be used to hold. the sheets in place on the supports to'which they are applied, and Whiley studding and joists have been mentioned as the supports against which the wall board or covering is placed, the said wall board or covering may be as eficiently secured over a flat surface or partition wall.

It is proposed to form the ribs or reinforcing strips 7 and 9 of wood, metal, compressed paper, or other suitable material and to have the same of such cross-sectional dimensions that they will snugly lit the corrugations or the spaces between the corrugations, and in the form where these ribs or strips are disposed between the corrugations on the outer surface of the sheet 6 the outer edges of the ribs will lie flush with the outer portions of the corrugations or will at least not project beyond said corrugations, though in some instances they may be inwardly a distance from the corrugated surfaces.

What is claimed is:

1. A wall board or covering consisting of a flat backing sheet, a front sheet firmly secured thereto and having corrugations extending in parallel relation and forming hollow inclosures which are clear throughout their length, the corrugations projecting solely from one side of the backing sheet, and solid stifi'ening ribs longitudinally and loosely inserted endwise'in the hollow corrugations and shiftable from one corrugation to another throughout the area of the wall board or covering to increase and materially reinforce certain portions of the wall board or covering that "ip may require greater strength or resistance, the ribs being held solely by frictional engagement with the portions of the hollow corrugations and the flat backing sheet.

2. vA Wall board or covering of a flexible character having a flat backing sheet, a front sheet firmly secured to the backing sheet and having corrugations extending in parallel relation and forming tubular inclosures relatively to the backing sheet, the inclosures being fully open throughout their entire length, and solid stifening ribs longitudinally and loosely inserted in the tubular corrugations and' shiftable from one corrugation to another, the ribs engaging the backing sheet and the apexes and side portions of the corrugations and prevented from turning in the corrugations.

In testimony whereof I have hereunto set my hand in presence of two subscribing Witnesses.

GEORGE I. CRUMBAUGH.

Witnesses: v

GEORGE A. RooDoLrI-I, JACOB F. LANG. 

